The effect of pyrolysis temperature on the generation of polycyclic aromatic hydrocarbons (PAHs) in sewage sludge biochar (SSB) and the removal of hazardous chemicals from esturine sediments by SSB and sodium percarbonate (SPC), exemplified by 4-nonylphenol (4-NP) were studied. SSB synthesized at 500 °C (SSB500) achieved the highest 4-NP degradation efficiency of 73%, at pH₀ 9.0 in 12 h of reaction time. The enhanced 4-NP degradation was attributed to the SSB500 activation activation of SPC that produced sufficient •OH and CO₃^−• due to electron-transfer interaction on the Fe–Mn redox pairs. The microbial community diversity and composition of the treated sediment were compared using high-throughput sequencing. Results showed SSB/SPC treatment increased the microbial diversity and richness in the sediments. Proteobacteria were the keystone phylum, while Thioalkalispira genera were responsible for 4-NP degradation in the SSB/SPC treatment. Over all, results revealed the change in the bacterial community during the environmental applications of SSB, which provided essential information for better understanding of the monitoring and improvement of sustainable sediment ecosystems.

热解温度对污水污泥生物炭（SSB）中多环芳烃（PAHs）的生成以及SSB和过碳酸钠（SPC）从河口沉积物中去除有害化学物质的影响，例如4-壬基苯酚（4-NP）被研究了。在500°C下合成的SSB（SSB500）在12 h的反应时间内在pH ₀ 9.0时达到了最高的4-NP降解效率73％。4-NP降解增强归因于SPC的SSB500活化活化，产生了足够的•OH和CO _3- ^•由于铁锰氧化还原对上的电子转移相互作用。使用高通量测序比较了处理过的沉积物的微生物群落多样性和组成。结果表明，SSB / SPC处理增加了沉积物中的微生物多样性和丰富度。变形杆菌是最主要的门，而硫代碱螺菌属在SSB / SPC处理中导致4-NP降解。总体而言，结果揭示了在SSB的环境应用过程中细菌群落的变化，这为更好地了解可持续沉积物生态系统的监测和改善提供了重要信息。